Edward e



(No Model.) 2 sheets-sheet 1.

A.- R. CAVNBlLDecd.

E. E. HOLKAN, Administrator.

LocoMoTIvB ENGINE.

No. 478,682. Patented July 12, 1892.

(No Model.) 2 Sheets-Sheet 2.

A'. R. CAVNER, Decd;

E. E. HoLMAN, Administrator. LOGOMOTIVE ENGINE.

No.478,682. PatentedJuy 12, 1892.

Mull

i l IJI:

ALEXANDER R. CAVNER, OF CHICAGO, ILLINOIS; EDWARD E. HOLMAN, AD-

MINISTRATOR OF SAID ALEXANDER R. CAVNER, DECEASED, ASSIGNOR y TO THE CAVNER LOCOMOTIVE IMPROVEMENT COMPANY, OF SAME PLACE.

LOCOIVIOTIVE-ENGINE.

SPECIFICATION forming part of Letters Patent No. 478,682, dated July 12, 1892.

Application filed August l, 1891.

To all whom it may concern.-

Be it known that I, ALEXANDER R. CAVNER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Locomotive-Engines, of which the following is a specification, reference being had to the accompanying drawings, in Which- Figure 1 is a side elevation of an engine, a portion of the side being broken away to show my improvements. Fig. 2A is a horizontal cross-section on line 2 2 of Fig. 1. Fig. 3 is a vertical cross-section on line 3 3 of Fig. 2; and Fig. 4 is an enlarged detail, being a vertical section of one of the supply-tubes.

My invention relates to locomotive-engines provided with apparatus for producing a draft through the furnace, and more particularly to locomotives of this class having a compartment in front of the boiler.

The object of my present invention is to provide improved means for supplying the furnace with fresh air and to create a forced draft through the furnace. I accomplish this object as hereinafter specified and as illustrated in the drawings.

That which I regard as new will be out in the claims.

In the drawings, 1 indicates a locomotive having a forward compartment 2. The compartment 2 has suitable openings to admit a supply of air into it.

3 indicates the flues of the boiler, which may be of the usual construction.

4 indicates a hood, which is placed over the end of the boiler which opens into the compartment 2 and is of such size as to cover all the flues except the lowermost row, which I have marked 5 in the drawings. The hood 4 is connected by means of a suitable tube 6 with the smoke-stack 7 of the locomotive. The tube 6 opens into the smoke-stack near its upper end, as shown by dottedY lines in Fig. 1.

8 indicates a tube, which is preferably of the shape shown in Fig. 2, having a flaring mouth 9, opening into the compartment 2, and being bent to the shape shown. The inpointed Serial No. 401,433.' (No model.)

ner end of the tube 8 incloses the lowermost fiues 5 of the boiler, as best shown in Fig. 2.

10 indicates a steam-pipe, which is adapted to conduct exhaust-steam from one of the cylinders 11 of the locomotive and extends into the pipe 8 and across the ends of the flues 5. Jets 12 extend from the pipe 10 into each of the flues 5, as best shown in Fig. 2.

. 13 and 14 indicate pipes, which communicate with the inner ends of the' iues 5 and eX- tend around the edges and across the end'of the fire-box, as best shown in Fig. 2. Each of the pipes 13 and 14 preferably consists of a single pipe bent to the shape shown and connected at its opposite ends to the iiues 5. The pipe 14 extends in a horizontal direction across the fire-box and is about upon a level with the bottom of the furnace-door 16. The pipe 13 is upwardly inclined, so that the portion farthest from the ends of the iiues 5 will be over the door 16. The door 16 may be of any usual construction. The transverse portions of the pipes 13 and 14 which are over and under the door 16, respectively, are provided with perforations 17, opening into the furnace, as best shown in Fig. 3.

18 indicates supply-tubes, which are flared at the bottom and are located in a perpendicular position in the fire-box, a pipe 18 being preferably placed at each corner of the fire-box. The lower ends of the pipes 18 project downward into the ash-box 19 of the furnace and are provided with flared ends 20, as shown. Suitable openings 21 are provided in the ash-box under the ends 2O of the pipes 1.8. The pipes 18 are provided with perforations 22, which open into the tire-box. By this construction a supply of fresh air may pass upward through the pipes 18 and be delivered through the openings 22 into the furnace.

When the locomotive is in operation, eX- haust-steam from the cylinders will pass upward through the pipe 10 and will be delivered through the jets 12 into the iiues 5 of the boiler. lThis will cause a current of air to iiow from the compartment 2 through the pipe 8 into the ues 5, whence it will pass back and be delivered into the furnace through the holes 17 in the pipes`13. By this construction a supply of fresh air to the furnace Will be constantly provided and a forced draft will be created by the action of the eX- haust-steam from the cylinders.

If desired, instead of using the exhauststeam from only one of the cylinders 11, both cylinders maybe connected to the tlues 5 in a manu-er similar to that described, and the curf rent ot' air flowing through the flues 5 Will then be steady instead of intermittent, as would be the case if exhaust-steam from only one cylinder Were used.

The number of iues 5 used to carry air to the furnace may be made greater or less, if desired, as it is not essential that any particular number shall be used.

Instead of using exhaust-steam from the cyl- 4 inders to make the air-current, live steam from the boilers may be used; but the former is preferred.

That WhichI cla-im as new, and desire to secure by Letters Patent, is

l. The combination, with a locomotive, of a boiler, a hood connecting some of the fines of said boiler with the smoke-stack, and devices for causing a current of fresh air to pass through the remaining flues of the boiler into the furnace, substantially as and for the purpose specified.

l2. The combination, With a locomotive having a compartment at its fron-tend, of ya boiler having ya hood which cuts olf some of its lines from communication With said compartment ,and leaves other iues in communication therewith, tubes connected lwith the locomotive-i cylinder for conducting exhaust-steam thercfrom into those boiler-dues which communicate With the front compartment for the purpose of causing a current of air to flow-through such fines into the locomotive-furnace, and means for supplying fresh air to the front compartment, substantially as described.

3. In a locomotive, the combinatiomwi'th a y boiler and a hood 4, adapted to deliver gases from the boiler 'into the smoke-stack, of a compartment 2 in front of the boiler, a tube 8, opening int-o said compartment and being connected to the lowermost flues of the boiler, and devices for causing a current of air to flow through said lowermost iiues of the boiler 'into the furnace of the locomotive, substantially I as and for the purpose specified.

4. The combination, with a locomotiveboiler, of an air-compartment arranged at the front end of the boiler in advance of the boilerflues, a hood which places some of the fines in communication With the smoke-stack and cuts them off from communication with the aircompartment, the remaining tlues communipartment 2 in front of the boiler, a tube 8,

opening into said compartment and being connected to the lowermost tlues of the boiler,

, and a tube leading from the cylinder of the locomotive, said 'tube having jets 12,'substantially as and for the purpose specified.

6. The combination, with a locomotiveboiler, of an air-compartment arranged at the front end of the compartment in advance of the boiler-fines, a hood which places some of the flues in communication with the smokestack and cuts them oif from communication vWith the air-compartment, theremain'ing flues v communicating with saidcompartmen t, a tube arranged in the air-compartment to conductair therefrom into some ofthe boiler-dues, and

a steam-pipe for conducting exhaust-steam from one of the locomotive-cylinders into the tube in the air-compartment for causing a current of air to l'loW into the locomotive-furnace, substantially as described.

7. The .com'binatiomwitha locomotive, of a boiler having an air-compartment at its front end, tubes arranged to convey fresh air from said compartment to the locomotive-furnace, the inclined tubes 13, having a transverse perl fol-ated portion, the tube 14, having a trans- ALEXANDER R, lCAVNER.

Witnesses:

RoB'r. B. PORTER, A. M. MILLER. 

